package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;
    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐
     * @param dto
     */
    @Transactional(rollbackFor = Exception.class)
    @Override
    public void addSetmeal(SetmealDTO dto) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(dto, setmeal);
        setmealMapper.insert(setmeal);
        List<SetmealDish> setmealDishes = dto.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size() > 0){
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmeal.getId());
            });
            setmealDishMapper.insertBatch(setmealDishes);
        }
    }

    /**
     * 套餐分页查询
     * @param dto
     * @return
     */
    @Override
    public PageResult page(SetmealPageQueryDTO dto) {
        PageHelper.startPage(dto.getPage(), dto.getPageSize());
        Page<SetmealVO> page = setmealMapper.list(dto);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Transactional(rollbackFor = Exception.class)
    @Override
    public void deleteBatch(List<Long> ids) {
        ids.forEach(id -> {
            Setmeal setmeal = setmealMapper.getBySetmealId(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        });
        setmealMapper.deleteBatch(ids);
        setmealDishMapper.deleteBatch(ids);
    }

    /**
     * 根据id查询套餐
     * @param id
     * @return
     */
    @Override
    public SetmealVO getById(Long id) {
        Setmeal setmeal = setmealMapper.getBySetmealId(id);
        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐
     * @param dto
     */
    @Transactional(rollbackFor = Exception.class)
    @Override
    public void update(SetmealDTO dto) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(dto, setmeal);
        setmealMapper.update(setmeal);
        List<Long> setmealId = new ArrayList<>();
        setmealId.add(dto.getId());
        setmealDishMapper.deleteBatch(setmealId);
        List<SetmealDish> setmealDishes = dto.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(dto.getId());
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐起售、停售
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        if (status == StatusConstant.ENABLE){
            List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
            setmealDishes.forEach(setmealDish -> {
                Dish dish = dishMapper.getById(setmealDish.getDishId());
                if (dish.getStatus() == StatusConstant.DISABLE){
                    throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            });
        }
        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        return setmealMapper.listBy(setmeal);
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
